Effect of prevention for chloride ion using both of CA2 and expansive admixture to low heat portland cement

Takafumi Ito, Takeshi Iyoda

研究成果: Conference contribution

抄録

Salt damage is one of the serious causes of deterioration in reinforce d concrete. However, when building mass concrete under salt damage environment, we have to use cement with a heat suppression effect which has low resistance for chloride ion. In this research, we focused on the CA2 which is admixture for salt damage prevention.CA2 reacts with calcium hydroxide from cement hydration and makes hydrocalumite. Thus, the soluble chloride ion is reduced. Finally, concrete using CA2 has high resistance for salt damage. LPC concrete using CA2 has low resistance for chloride ion than OPC concrete using CA2. After that, we had XRD measurement, and we have confirmed that hydration product is different in LPC and OPC when adding CA2 and expansive admixture. We think that the difference of hydration product is reason for difference of salt damage prevention by difference of ability to immobilize chloride ion.

本文言語English
ホスト出版物のタイトルLife-Cycle of Engineering Systems: Emphasis on Sustainable Civil Infrastructure - 5th International Symposium on Life-Cycle Engineering, IALCCE 2016
出版社CRC Press/Balkema
ページ1319-1326
ページ数8
ISBN(印刷版)9781138028470
出版ステータスPublished - 2017
イベント5th International Symposium on Life-Cycle Engineering, IALCCE 2016 - Delft, Netherlands
継続期間: 2016 10 162016 10 20

Other

Other5th International Symposium on Life-Cycle Engineering, IALCCE 2016
国/地域Netherlands
CityDelft
Period16/10/1616/10/20

ASJC Scopus subject areas

  • 土木構造工学
  • 安全性、リスク、信頼性、品質管理

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